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将购票和取消订单改为存储过程和触发器

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This commit is contained in:
Jingfan Ke 2024-06-14 21:26:48 +08:00
parent e435ae4035
commit 97e7382a6d
6 changed files with 84 additions and 50 deletions
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1
Project/Manager/data_source/db_user.sql
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@ -13,5 +13,6 @@ GRANT ALL PRIVILEGES ON ServiceDatabase.Airports TO 'serviceAgent'@'%';
GRANT ALL PRIVILEGES ON ServiceDatabase.Tickets TO 'serviceAgent'@'%';
GRANT SELECT, UPDATE (First_class_seats_remaining, Business_class_seats_remaining, Economy_class_seats_remaining)
ON ServiceDatabase.Flights TO 'serviceAgent'@'%';
GRANT EXECUTE ON PROCEDURE ServiceDatabase.AddPassengerAndTicket TO 'serviceAgent'@'%';
FLUSH PRIVILEGES;

62
Project/Manager/data_source/init_service_db.sql
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@ -68,4 +68,64 @@ CREATE TABLE ServiceDatabase.Tickets (
FOREIGN KEY (PassengerID) REFERENCES Passengers(ID) ON DELETE CASCADE,
FOREIGN KEY (OrderID) REFERENCES Orders(ID) ON DELETE CASCADE,
CHECK (Seat_class IN ('First Class', 'Business Class', 'Economy Class'))
);
);
USE ServiceDatabase;
DELIMITER //
CREATE PROCEDURE AddPassengerAndTicket(
IN p_passenger_id VARCHAR(18),
IN p_name VARCHAR(255),
IN p_phone_number BIGINT,
IN p_seat_class VARCHAR(255),
IN p_flight_id VARCHAR(255),
IN p_price DECIMAL(7, 2),
IN p_order_id INT
)
BEGIN
-- 插入或更新乘客信息
INSERT INTO Passengers (ID, Name, Phone_number)
VALUES (p_passenger_id, p_name, p_phone_number)
ON DUPLICATE KEY UPDATE Name=VALUES(Name), Phone_number=VALUES(Phone_number);
-- 更新航班座位数
IF p_seat_class = 'First Class' THEN
UPDATE Flights
SET First_class_seats_remaining = First_class_seats_remaining - 1
WHERE ID = p_flight_id;
ELSEIF p_seat_class = 'Business Class' THEN
UPDATE Flights
SET Business_class_seats_remaining = Business_class_seats_remaining - 1
WHERE ID = p_flight_id;
ELSEIF p_seat_class = 'Economy Class' THEN
UPDATE Flights
SET Economy_class_seats_remaining = Economy_class_seats_remaining - 1
WHERE ID = p_flight_id;
END IF;
-- 插入机票信息
INSERT INTO Tickets (Price, FlightID, Seat_class, PassengerID, OrderID)
VALUES (p_price, p_flight_id, p_seat_class, p_passenger_id, p_order_id);
END //
CREATE TRIGGER restore_seats
BEFORE DELETE ON Tickets
FOR EACH ROW
BEGIN
IF OLD.Seat_class = 'First Class' THEN
UPDATE Flights
SET First_class_seats_remaining = First_class_seats_remaining + 1
WHERE ID = OLD.FlightID;
ELSEIF OLD.Seat_class = 'Business Class' THEN
UPDATE Flights
SET Business_class_seats_remaining = Business_class_seats_remaining + 1
WHERE ID = OLD.FlightID;
ELSEIF OLD.Seat_class = 'Economy Class' THEN
UPDATE Flights
SET Economy_class_seats_remaining = Economy_class_seats_remaining + 1
WHERE ID = OLD.FlightID;
END IF;
END //
DELIMITER ;

BIN
Project/Service/func/__pycache__/book.cpython-311.pyc
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Project/Service/func/__pycache__/cancel_order.cpython-311.pyc
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27
Project/Service/func/book.py
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@ -37,7 +37,7 @@ def book():
if not passengers:
flash("请至少添加一位乘客", "error")
return redirect(url_for('index'))
return redirect(url_for('search'))
conn = pymysql.connect(**db)
cursor = conn.cursor()
@ -62,25 +62,8 @@ def book():
cursor.execute(price_sql, (flight_id,))
price = cursor.fetchone()[0]
insert_passenger_sql = """
INSERT INTO Passengers (ID, Name, Phone_number)
VALUES (%s, %s, %s)
ON DUPLICATE KEY UPDATE Name=VALUES(Name), Phone_number=VALUES(Phone_number);
"""
cursor.execute(insert_passenger_sql, (passenger_id, name, phone_number))
update_seat_sql = f"""
UPDATE Flights
SET {seat_class.replace(' ', '_').lower()}_seats_remaining = {seat_class.replace(' ', '_').lower()}_seats_remaining - 1
WHERE ID = %s
"""
cursor.execute(update_seat_sql, (flight_id,))
insert_ticket_sql = """
INSERT INTO Tickets (Price, FlightID, Seat_class, PassengerID, OrderID)
VALUES (%s, %s, %s, %s, %s)
"""
cursor.execute(insert_ticket_sql, (price, flight_id, seat_class, passenger_id, order_id))
# 调用存储过程
cursor.callproc('AddPassengerAndTicket', (passenger_id, name, phone_number, seat_class, flight_id, price, order_id))
conn.commit()
return redirect(url_for('order', order_id=order_id))
@ -89,8 +72,8 @@ def book():
conn.rollback()
print(e)
flash("订票失败", "error")
return redirect(url_for('index'))
return redirect(url_for('search'))
finally:
cursor.close()
conn.close()
conn.close()

44
Project/Service/func/cancel_order.py
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@ -1,4 +1,4 @@
from flask import request, redirect, url_for, g
from flask import request, redirect, url_for, g, flash
from .config import db
import pymysql
@ -19,33 +19,23 @@ def cancel_order():
conn.close()
return redirect(url_for("order_list"))
# 查询订单中所有机票的航班ID和座位级别
tickets_sql = "SELECT FlightID, Seat_class FROM Tickets WHERE OrderID = %s"
cursor.execute(tickets_sql, (order_id,))
tickets = cursor.fetchall()
try:
# 删除对应的机票
delete_tickets_sql = "DELETE FROM Tickets WHERE OrderID = %s"
cursor.execute(delete_tickets_sql, (order_id,))
# 恢复航班的对应余座数
for ticket in tickets:
flight_id = ticket['FlightID']
seat_class = ticket['Seat_class']
seat_column = seat_class.replace(' ', '_').lower() + "_seats_remaining"
update_seat_sql = f"""
UPDATE Flights
SET {seat_column} = {seat_column} + 1
WHERE ID = %s
"""
cursor.execute(update_seat_sql, (flight_id,))
# 删除订单
delete_order_sql = "DELETE FROM Orders WHERE ID = %s"
cursor.execute(delete_order_sql, (order_id,))
# 删除对应的机票
delete_tickets_sql = "DELETE FROM Tickets WHERE OrderID = %s"
cursor.execute(delete_tickets_sql, (order_id,))
# 删除订单
delete_order_sql = "DELETE FROM Orders WHERE ID = %s"
cursor.execute(delete_order_sql, (order_id,))
conn.commit()
cursor.close()
conn.close()
conn.commit()
flash("订单取消成功", "success")
except Exception as e:
conn.rollback()
print(e)
flash(f"订单取消失败：{e}", "error")
finally:
cursor.close()
conn.close()
return redirect(url_for('order_list'))